Abu `Ali al-Farmadhi at-Tusi

He is called the Knower of the Merciful and the Custodian of Divine Love. The most famous shaykh of his time, as-Simnani, said about him, "He was the Tongue of Khurasan and its shaykh and the master in lifting up and raising the station of his followers. His associations were like gardens full of flowers, in which knowledge flowed from his heart and took the hearts of his listeners into a state of joy and happiness."